XR3070-78X Datasheet, PDF (12/24 Pages) Exar Corporation – LOW POWER 18V TOLERANT RS-485/RS-422 +3.3V TRANSCEIVERS

XR3070-78X
LOW POWER 18V TOLERANT RS-485/RS-422 +3.3V TRANSCEIVERS
FIGURE 6. TRANSIENT OVER-VOLTAGE TEST CIRCUIT
Device powered on or powered off
A or Z
Transceiver,
100
Generator, or
Receiver
B or Y
REV. 1.0.2
V_TEST
15us duration
15 duty cycle
FIGURE 7. DRIVER PROPAGATION DELAY TEST CIRCUIT & TIMING DIAGRAM
DI
3V
0V
Z
V_OD
(V_Y - V_Z)
Y
V_OD+
0V
V_OD-
1.5V
t_DPLH
1.5V
V_OD
t_SKEW = |t_DPHL – t_DPLH|
t_DPHL
90%
10%
t_DR
90%
10%
t_DF
DI
D
Z
V_OD
R_L
C_L
DE = V_CC
Y
12